The WetVac has a voice prompt feature, which intelligently guides the user in various scenarios such as charging the vacuum when the battery is low, checking the water tank when it is full, and starting the self-cleaning process on the charging base, etc. You are also able to press the self-cleaning button to easily enable or disable the voice prompt feature.

The following link also walks you through the process of selecting a voice prompt language pack and adjusting the voice prompt volume:

How to Select Voice Prompt Language and Adjust Volume for the WetVac 

If you need any further assistance, please contact eufy support.